Door-handling mechanism



Patented May 30, 1 922.

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APPLICATION FILED APR. 5 1920.

UNITED STATES PATENT OFFICE. v

WILLIAM E. BOYER, OF CLEVELAND, OHIO, ASSIGNOR 'I'O SAMSON D. WRIGHT, 01!? CLEVELAND, OIHFIO.

DOOR-HANDLING MECHANISM. I I

Specification of Letters Patent.

Patented May 30,1922.

I Application filed April 5, 1920. Serial No. 371,454.

To all whom it may concern:

Be it known that I, WILLIAM E. Born, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Door-Handling Mechanism, of which the following is a specification.

This invention relates to mechanism for handling the doors of coke ovens. :The object of the invention is to provide improved door handling mechanism which is so arranged as to progressively peel or break away the door from its setting in the door opening of the oven, thereby enabling it to be more readily handled in operating the coke oven and reducing wear and tear and the liability of breakage of or injury to either the door or parts of the door ,handling mechanism. A further object of the invention is to provide door handling mechanism which is so arranged as to produce a lifting movement of the door as it moves away from the oven to avoid dragging it along the floor and thereby reducin frictional. resistance and avoiding inter erence with the door byobjects on the floor.

Further objects of the invention are in part obvious and in part will appear more in detail hereinafter.

In the drawings, which represent one suitable embodiment of the invention, Fig.

1 is a view partly in side elevation and partly broken out and in section; i 2 is a section on the line 2-2, Fig. 1; an Fig. 3- is' a detail sectional elevation on the line 3-3, Fig. 2. Q i

1 indicates a portion of the wall ofv the coke oven which is provided with a door opening 2 to receive the door 3. Said door may be of any of the usual forms of. doors for this purpose and is usually provided with ajmetal frame or casing 'shaped to wedge into the door'opening and provided with a flange 5 forming with flange 61a recess 7 around the door opening which is luted with clay or other suitable refractory material to seal the joint. When this refractory material becomes setthe door is very solidly held in place and considerable force is necessary to break it away inorder to expose the openinlg the oven chamber. he door. is also [provided withthe usual lugs'j8 adapted for e'ngagemml b thq door handling mechanism.

-hand wheels 28. j and" gain access to J 9 represents a portion of the frame of the machine f0r handling the doors and manipulating the furnace charge. This machine, generally speaking, is of the well known form 'travellng along a track in front of a battery of ovens and provided with mechanism for actuating its various elements, such as the usual pusher, leveler, and door handling member. Only that portion of the machine has been illustrated which relates to the present invention.

On the frame 9 are suitably mounted a series, four bein shown, of rollers 10 arranged in two pairs, each including an upper and a lower roller in vertical alignment with each'other. Between the upper and lower rollers travels a beam 11 of rigid construction and extending from the frame forwardly'toward the oven. Said beam is supported by the rollers and has sliding or rolling motion toward and from the oven between vertical bars 12 of the frame. On its forward or advance end it carries suitable mechanism for manipulating the door, later to be described. Said beam is actuated for producing its longitudinal reciprocation by anysuitable mechanism. The drawings show for this purpose. a pinion 13 meshing carried by the cam. The rear ends of said levers are connected by a rod 21 which includes a turnbuckle or other adjusting member 22 for varying the length of said rod and relatively adjusting the jaws 17-so that said jaws will simultaneously engage the lugs 8 and each take its proper share of the load. Rod 21 also insures simultaneous and uniform 'motion of both jaws. One 'of the', levers 18, such asthe: upper lever,- is connected by links 23nto a nut 24 on a screw shaft 25 mountedin' bearings on the frame "20 and actuated by bevel gears 26 driven from. a horizontal shaf t 27 provided with The mechanism so f' desjrib is utilized in the ordinar'yflmanner by first adjusting the machine so that the door handling mechanism registers with the door, advancing the by prlor machines for this purpose, involves breaking away the cement or refractory sealing material simultaneously around the entire door periphery, a duty which requires excessive power and involves unnecessary strain upon both the door handling machine and the door itself, particularly the lugs thereof. According to the present invention the upper and lower surfaces of the beam 11 which travel upon the rollers 10 are curved preferably in the arc of a circle of relatively long radius as shown clearly in Fig. 1. Consequently, when power is exerted upon the beam 11 to withdraw 'or retract the same its effect upon the door is to tilt the same about a horizontal axis. In the final position of the door this tilting has increased until it becomes quite pronounced, but even at the initiation or very beginning of the door movement there is'a tendency to tilt the door, its upper edge moving outwardly or away from the oven'faster than its lower edge- In effect, therefore, the power applied to retract the beam 11 is first applied with concentrated effect upon the upper-edge of the door with a pronounced tendency to first break away the sealing material. at the upper edge of the door and, as it were, progressively peel the door out from the opening. While the effect may not be perceptiblev to the eye, nevertheless, it is found that less force is necessary to remove a door in this manner than when it is broken away by movement bodily along a right line. Moreover, inrestoring the doorv to seating position in the door frame its lower edge is first seated and the final pressure is applied to the upper edge of the door so that it becomes very solidly seated in'the opening. While the center of the curvature of the beam surfaces may be'in the plane of the oven door, nevertheless, under certain conditions the center of the curvature may be in a vertical plane transverse to the beam and spaced some distance away from the plane of the door. The last named arrangement is shown in Fig. 1. As a result thereof as it recedes from the door opening, rises the path of the movement of the beam,

gradually from a horizontal plane, as shown in Fig. 1. ,This arrangement is particularly useful in constructions where the body of the furnace is built with a floor or platform 30 in front of the body and at practically the level of the bottom of the door opening, and the arrangement described produces graduallifting movement of the door as it recedes from the door opening, thereby avoiding excessive frictional resistance produced by dragging the door over a floor and preventing the door from encountering objects or obstructions upon the platform 30.

What I claim is:

1. Mechanism for handling the doors of coke ovens, including a beam, means on said beam for engaging the door, and means for guiding said beam bodily through a curved path so as to move one part of the door outwardly at agreater rate of speed than another part thereof.

2. Mechanism for handling the doors of coke ovens, including a beam, means on said beam for engaging the door, and means for moving said beam through a curved path corresponding substantially to the length of said beam, so as to move one part of the door outwardly at a greater rate of speed than another part thereof.

3. Mechanism for handling the doors of coke ovens, including'a beam, means on said beam for engaging the door, and means ineluding rack and pinion mechanism for moving said beam through a curved path so as to move one part of the door outwardly at a greater rate of speed than another part thereof.

4. Mechanism for handling the doors of coke ovens, including a curved beam, means on said beam for engaging the door, and means for guiding said beam bodily through a curved path so as to move one part of the door outwardly at a greater rate of speed than. another part thereof.

5. Mechanism for handling the-doors of coke ovens, including a beam, means adjustable on said beam for engaging the door, and means for guiding said beam through a curved path so as to move one part of the door outwardly at agreater rate of speed than another part thereof.

In testimony whereof I aflix my signature.

WILLIAM E. BOYER. 

